Alumina Lightweight Ceramics Modified with Plasma Synthesized Nanopowders

IOP Conference Series: Materials Science and Engineering 2011
Ieva Zaķe-Tiļuga, Ruta Švinka, Visvaldis Švinka, Ēriks Palčevskis

The aim of this study is to clarify possibilities of using plasma synthesized Al2O3 and SiC nanopowders as additives in alumina lightweight ceramics prepared by slip casting. Each plasma synthesized nanopowder (PSNP) was incorporated in the material by a different method, because of their diverse influence on the properties of slip. Al2O3 PSNP was introduced in the matrix in form of aqueous suspension. SiC nanopowder was added directly to raw materials. Bending strength, bulk density, apparent porosity and thermal shock resistance were determined to evaluate the influence of these additives. The effect of Al2O3 PSNP addition on the properties of material depends on the initial sintering temperature. SiC particles during sintering oxidize into SiO2 and then in the reaction with alumina form mullite. Addition of SiC considerably improves bending strength and thermal shock resistance.

Keywords
alumina, porous ceramic, nanopowders, mechanical properties
DOI
10.1088/1757-899X/25/1/012021
Hyperlink
http://iopscience.iop.org/1757-899X/25/1/012021

Zaķe-Tiļuga, I., Švinka, R., Švinka, V., Palčevskis, E. Alumina Lightweight Ceramics Modified with Plasma Synthesized Nanopowders. IOP Conference Series: Materials Science and Engineering, 2011, Vol.25, Iss.1, pp.012021-012021. ISSN 1757-8981. e-ISSN 1757-899X. Available from: doi:10.1088/1757-899X/25/1/012021

Publication language
English (en)